1971 LONGSTREET William Smith in The Shape of Nightmares

In 1971 I was 7 years old and one of my favorite TV shows starred James Franciscus as Longstreet. Here is S01E07 The Shape of Nightmares from October 28, 1971 guest starring one of my favorite actors, William Smith.
A young widow asks Mike to look into the apparent suicide of her husband, who died in prison. Mike enters the prison to investigate, and discovers evidence that he was actually murdered. A convict that Mike had sent to jail is now the "Head of the Yard", running the other inmates like a mob-boss from inside the prison walls, intent on getting revenge on Longstreet. Mike must use all his wits to solve the murder and stay alive.
Director: James Neilson
Writers: Stirling Silliphant, Baynard Kendrick
Stars: James Franciscus, Marlyn Mason, Dana Elcar, William Smith